Thermodynamics and Characteristics of Heterogeneous Nucleation on Fractal Surfaces,The Journal of Physical Chemistry C

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Thermodynamics and Characteristics of Heterogeneous Nucleation on Fractal Surfaces
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2015-11-23 00:00:00 , DOI: 10.1021/acs.jpcc.5b07709
Qiang Zeng ₁ , Shilang Xu ₁

Affiliation

Clarifying heterogeneous nucleation process on fractal surfaces is an important issue to understand its thermodynamic principles and forward the engineering aspects. We developed a thermodynamic model to capture the process of forming a crystal or drop embryo on fractal surfaces and the corresponding characteristic parameters. We showed that the differences between the critical size of the embryos on the fractal surfaces and those on the flat surfaces are negligible for the hydrophobic nuclei, but become significant for the hydrophilic nuclei. We reported the available domains of forming the critical embryos and obtained the shape function for the first time. The results also recover the data reported in the literature. Finally, we present the possible mechanisms of vanishing of the energy barriers against forming the critical embryos on the fractal surfaces as the apparent contact angle is relatively small. The obtained results may help to engineer the nucleation process by designing substrate surfaces in a fractal structure.

中文翻译：

分形表面的热力学和非均相形核特征

弄清楚分形表面的异相成核过程是理解其热力学原理并向前推进工程方面的重要问题。我们开发了一个热力学模型来捕获在分形表面上形成晶体或液滴胚胎的过程以及相应的特征参数。我们表明，在分形表面和平坦表面上的胚的临界尺寸之间的差异对于疏水核而言可以忽略不计，但对于亲水核而言则变得显着。我们报道了形成关键胚胎的可用结构域，并首次获得了形状功能。结果还恢复了文献中报道的数据。最后，由于表观接触角相对较小，我们提出了消除能垒以防止在分形表面上形成关键胚胎的可能机制。通过以分形结构设计基板表面，获得的结果可能有助于工程化成核过程。

更新日期：2015-11-23

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